Expansion joint device for a bridge crane track

Abstract

The utility model discloses a bridge -type crane track expansion joint joint device belongs to crane track technical field, including first joint, second joint and track main part, first joint one end is provided with first lap joint, and second joint one end is provided with second lap joint, and first lap joint and second lap joint between the reserved setting have expansion joint, and first joint bottom both sides and second joint bottom both sides are provided with fixed establishment respectively, and first joint and second joint are connected with track main part through fixed establishment respectively, and through the installation gap and first joint, second joint lap joint length's design of expansion joint, realize track main part thermal expansion and cold shrink's self -adaptation adjustment, need not bolt connection to track joint, avoid appearing the risk that connecting part pulls apart, guarantee track intensity, can ensure track's displacement compensation function too.

Description

Technical Field

[0001] This utility model belongs to the field of crane track technology, specifically a bridge crane track expansion joint device. Background Technology

[0002] Bridge cranes are lifting equipment that spans across workshops, warehouses, and material yards to transport materials. They can lift various raw materials, such as steel and castings, to processing equipment for convenient parts processing. When the track reaches a certain length, expansion joints must be installed to offset the expansion caused by thermal expansion and to prevent the tracks from squeezing against each other when they shrink due to cold contraction.

[0003] Chinese patent CN202054534U discloses a bridge crane track expansion joint structure, comprising two opposing inclined tracks. The ends of the two tracks are fixed together by bolts and connecting plates, fundamentally limiting track movement and preventing misalignment of the expansion joint due to excessive separation or mutual compression between the track ends. This prevents strong vibrations or wheel jamming when wheels pass over the tracks, thus better ensuring the safe operation of the bridge crane. However, during crane operation, displacement of the tracks along the crane's trolley direction may break the connecting plates and bolts, damaging the inclined tracks and affecting the crane's normal operation.

[0004] Therefore, there is an urgent need for an expansion joint device for bridge crane rails that eliminates the need for bolted connections between rail joints, avoiding the risk of broken connecting components, ensuring both rail strength and displacement compensation function. Utility Model Content

[0005] The purpose of this utility model is to provide an expansion joint device for bridge crane rails, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an expansion joint device for bridge crane rails, comprising a first joint, a second joint, and a rail body; The first connector has a first overlapping portion at one end, and the second connector has a second overlapping portion at one end; An expansion joint is provided between the first overlapping part and the second overlapping part; Fixing mechanisms are provided on both sides of the bottom of the first connector and on both sides of the bottom of the second connector, and the first connector and the second connector are respectively connected to the track body through the fixing mechanisms.

[0007] Furthermore, the expansion joint has an expansion range of 10mm-15mm.

[0008] Furthermore, the fixing mechanism comprises a plurality of fixed rail clamps, which are respectively disposed on both sides of the bottom of the first joint and on both sides of the bottom of the second joint.

[0009] Furthermore, the fixed rail clamp includes a clamping plate, a wedge block, and a fixing bolt.

[0010] Furthermore, the clamping plate is an L-shaped clamping plate.

[0011] Furthermore, one side of the L-shaped clamping plate abuts against the bottom side of the first joint, and the other side of the L-shaped clamping plate is connected to the wedge block. Furthermore, the bottom sides of the first connector and the second connector are respectively provided with arc-shaped portions.

[0012] Furthermore, one end of the clamping plate is provided with an arc-shaped protrusion corresponding to the arc-shaped portion.

[0013] Furthermore, the clamping plate is provided with a first through hole, the wedge block is provided with a second through hole, and the fixing bolt is threadedly connected to the track body through the first through hole and the second through hole.

[0014] Furthermore, the thickness of the first overlapping portion is half the overall thickness of the first joint, and the thickness of the second overlapping portion is half the overall thickness of the second joint.

[0015] According to the present invention, at least the following technical effects are achieved: The first lap of the first joint and the second lap of the second joint are fitted together by a pre-reserved expansion joint. When the rail body expands due to thermal expansion, the expansion joint is compressed to offset the expansion. When the rail body shrinks due to cold contraction, the first and second joints move with the rail body, and the overlap length of the first and second laps offsets the shrinkage. At the same time, the bottom fixing mechanism restricts the vertical jump and unnecessary horizontal displacement of the joints. Without the need for auxiliary parts such as sliders and bolts, the design of the installation gap of the expansion joint and the overlap length of the first and second joints enables the adaptive adjustment of the thermal expansion and contraction of the rail body, ensuring the load-bearing capacity of the connection parts and the smooth operation of the crane. There is no need to bolt the rail joints, avoiding the risk of the connecting parts breaking. This ensures both the strength of the rail and the displacement compensation function of the rail. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 A schematic diagram of the overall structure of an expansion joint device for a bridge crane track provided by this utility model; Figure 2 A schematic diagram of the connection between the first connector and the second connector provided by this utility model; Figure 3 This is a schematic diagram of the fixed rail clamp structure provided by this utility model; Figure 4 A schematic diagram of the clamping plate structure provided by this utility model; Figure 5 A schematic diagram of the wedge block structure provided by this utility model.

[0018] Figure label: 1. First joint; 101. First overlapping part; 102. Arc-shaped part; 2. Second joint; 201. Second overlapping part; 3. Track body; 4. Expansion joint; 5. Fixed rail clamp; 501. Pressing plate; 5011. Arc-shaped protrusion; 5012. First through hole; 502. Wedge block; 5021. Second through hole; 503. Fixing bolt. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] like Figure 1-5 The present invention provides an expansion joint device for a bridge crane track, comprising a first joint 1, a second joint 2, and a track body 3; one end of the first joint 1 is provided with a first overlap portion 101, and one end of the second joint 2 is provided with a second overlap portion 201; an expansion joint 4 is provided between the first overlap portion 101 and the second overlap portion 201; fixing mechanisms are respectively provided on both sides of the bottom of the first joint 1 and the bottom of the second joint 2, and the first joint 1 and the second joint 2 are respectively connected to the track body 3 through the fixing mechanisms; The first overlapping part 101 of the first joint 1 and the second overlapping part 201 of the second joint 2 are connected by a reserved expansion joint 4. When the track body 3 expands due to thermal expansion, the expansion joint 4 is compressed to offset the expansion. When the track body 3 shrinks due to cold contraction, the first joint 1 and the second joint 2 move with the track body 3. The overlap length of the first overlapping part 101 and the second overlapping part 201 offsets the shrinkage. At the same time, the bottom fixing mechanism restricts the vertical jump and unnecessary horizontal displacement of the joint. Without the need for auxiliary parts such as sliders and bolts, the installation gap of the expansion joint 4 and the design of the overlap length of the first joint 1 and the second joint 2 enable the adaptive adjustment of the thermal expansion and contraction of the track body 3, ensuring the load-bearing capacity of the connection part and the smooth operation of the crane. There is no need to bolt the track joints, avoiding the risk of the connecting parts breaking. This ensures both the strength of the track and the displacement compensation function of the track.

[0026] In one embodiment, see Figure 1 and Figure 2The expansion joint 4 has an expansion range of 10mm-15mm. When the track body 3 expands due to heat, the expansion joint 4 can compress by up to 15mm to absorb the expansion and prevent the first joint 1 and the second joint 2 from being squeezed and deformed. When the track body 3 contracts due to cold, the expansion joint 4 can expand by up to 10mm. At this time, the first overlapping part 101 and the second overlapping part 201 maintain contact through sufficient overlap length to offset the shrinkage and ensure seamless connection of the surface of the track body 3. At the same time, the bottom fixing mechanism restrains the vertical jump and unnecessary displacement of the joint, ensuring load-bearing capacity and smooth operation. Moreover, no auxiliary parts such as sliders and bolts are required. Adaptive adjustment is achieved solely through the design of the size and overlap length of the expansion joint 4.

[0027] In one embodiment, see Figure 3 and Figure 4 The fixing mechanism consists of several fixed rail clamps 5, which are respectively set on both sides of the bottom of the first joint 1 and the bottom of the second joint 2. The fixed rail clamps 5 are evenly distributed on both sides of the bottom of the first joint 1 and the second joint 2. Their main function is to press the joint tightly onto the rail body 3 by the bolt preload, thereby limiting the lifting or jumping of the joint in the vertical direction.

[0028] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The fixed rail clamp 5 includes a clamping plate 501, a wedge block 502, and a fixing bolt 503. The clamping plate 501 is directly attached to both sides of the bottom of the joint. The pressure is transmitted to the wedge block 502 through the pre-tightening force of the fixing bolt 503. The wedge block 502 uses the inclined plane self-locking principle to convert the axial force of the bolt into a clamping force perpendicular to the rail body 3, which strengthens the vertical constraint on the first joint 1 and the second joint 2 and prevents the joint from being vertically lifted due to vibration when the crane is running.

[0029] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The clamping plate 501 is an L-shaped clamping plate. The horizontal section of the clamping plate 501 fits against the bottom step surface of the joint, and the inner side of the vertical section cooperates with the inclined surface of the wedge block 502, thereby restricting the vertical lifting of the first joint 1 and the second joint 2 and fixing them firmly.

[0030] In one embodiment, see Figure 2 , Figure 3 and Figure 4The clamping plate 501 is an L-shaped clamping plate 501. One side of the L-shaped clamping plate 501 abuts against the bottom side of the first joint 1, and the other side of the L-shaped clamping plate 501 is connected to the wedge block 502. The L-shaped clamping plate 501 abuts against the bottom side of the first joint 1, which can directly limit the lateral displacement of the joint. The other side is connected to the wedge block 502, which converts the axial force of the fixing bolt 503 into a vertical clamping force through the wedge block 502. The double constraint prevents the joint from being vertically lifted due to vibration when the crane is running, and the fixation is stable.

[0031] In one embodiment, see Figure 1 , Figure 2 and Figure 3 The bottom sides of the first connector 1 and the second connector 2 are respectively provided with arc-shaped parts 102, and the arc-shaped parts 102 form a matching contact with the transverse section of the pressure plate 501. When the first connector 1 and the second connector 2 slide along the track length direction due to thermal expansion and contraction, the arc-shaped surface of the arc-shaped part 102 can transform the rigid point contact between the transverse section of the pressure plate 501 and the side of the first connector 1 and the second connector 2 into a curved surface contact, thereby reducing the frictional resistance and local wear when the two move relative to each other.

[0032] In one embodiment, see Figure 2 , Figure 3 and Figure 4 One end of the clamping plate 501 is provided with an arc-shaped protrusion 5011 corresponding to the arc-shaped part 102. The core function of the arc-shaped protrusion 5011 corresponding to the arc-shaped part 102 is to further optimize the contact shape and motion constraint by complementing the curved surface of the arc-shaped part 102: the curvature of the arc-shaped protrusion 5011 matches the arc-shaped part 102, which can disperse local stress and avoid indentation or dent due to long-term sliding; reduce the sudden change in sliding resistance caused by impurities, ensure smooth adjustment process, and extend the service life of the joint and the rail clamp in conjunction with the arc-shaped part 102.

[0033] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The clamping plate 501 is provided with a first through hole 5012, and the wedge block 502 is provided with a second through hole 5021. The fixing bolt 503 is threadedly connected to the track body 3 through the first through hole 5012 and the second through hole 5021. The first through hole 5012 of the clamping plate 501 and the second through hole 5021 of the wedge block 502 are coaxially arranged. After the fixing bolt 503 passes through, it is threadedly connected to the track body 3. The principle is that the pre-tightening force of the fixing bolt 503 makes the clamping plate 501 and the wedge block 502 fit tightly together. The inclined surface of the wedge block 502 converts the axial force into a vertical clamping force, which makes it easy to fix the clamping plate 501 on the track body 3.

[0034] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The thickness of the first overlapping part 101 is half the overall thickness of the first joint 1, and the thickness of the second overlapping part 201 is half the overall thickness of the second joint 2. The combined thickness of the first overlapping part 101 and the second overlapping part 201 is exactly equal to the overall thickness of the first joint 1 and the second joint 2, ensuring that there are no step protrusions on the surface of the track body 3 and that no impact vibration will occur when the crane wheels pass over it. At the same time, the symmetrical thickness design makes the contact area of ​​the overlapping part match the strength of the joint body, and the load can be evenly transferred to the joints on both sides through the first overlapping part 101 and the second overlapping part 201, avoiding local stress concentration caused by excessive thickness on one side.

[0035] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. An expansion joint device for bridge crane rails, characterized in that, include: First joint (1), second joint (2) and track body (3); The first connector (1) has a first overlapping part (101) at one end, and the second connector (2) has a second overlapping part (201) at one end. An expansion joint (4) is provided between the first overlapping part (101) and the second overlapping part (201). Fixing mechanisms are provided on both sides of the bottom of the first connector (1) and the bottom of the second connector (2). The first connector (1) and the second connector (2) are respectively connected to the track body (3) through the fixing mechanisms.

2. The expansion joint device for bridge crane rails according to claim 1, characterized in that, The expansion joint (4) has an expansion range of 10mm-15mm.

3. The expansion joint device for bridge crane rails according to claim 1, characterized in that, The fixing mechanism consists of several fixing rail clamps (5), which are respectively arranged on both sides of the bottom of the first joint (1) and the bottom of the second joint (2).

4. The expansion joint device for bridge crane rails according to claim 3, characterized in that, The fixed rail clamp (5) includes a clamping plate (501), a wedge block (502), and a fixing bolt (503).

5. The expansion joint device for bridge crane rails according to claim 4, characterized in that, The clamping plate (501) is an L-shaped clamping plate.

6. The expansion joint device for bridge crane rails according to claim 5, characterized in that, One side of the L-shaped clamping plate (501) abuts against the bottom side of the first connector (1), and the other side of the L-shaped clamping plate (501) is connected to the wedge block (502).

7. The expansion joint device for bridge crane rails according to claim 5, characterized in that, The bottom sides of the first connector (1) and the second connector (2) are respectively provided with arc-shaped parts (102).

8. The expansion joint device for bridge crane rails according to claim 7, characterized in that, One end of the clamping plate (501) is provided with an arc-shaped protrusion (5011) corresponding to the arc-shaped part (102).

9. The expansion joint device for bridge crane rails according to claim 8, characterized in that, The clamping plate (501) is provided with a first through hole (5012), the wedge block (502) is provided with a second through hole (5021), and the fixing bolt (503) is threadedly connected to the track body (3) through the first through hole (5012) and the second through hole (5021).

10. A bridge crane rail expansion joint device according to any one of claims 1 to 9, characterized in that, The thickness of the first overlapping part (101) is half the overall thickness of the first joint (1), and the thickness of the second overlapping part (201) is half the overall thickness of the second joint (2).

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